Features: The regular case trimmer cutter trims .17 to .45 caliber cases. The Trimmer Cutter is designed to trim cases to length and has been perfected over the last 70+ years to give you a flat square cut with little effort. Hardened to 60 Rockwell. Trimmer Cutter = Cases up to .490 (.17 - .45) Note: To be used with the Stainless Steel Case Trimmer and Stainless Micrometer Case Trimmer Power Adapter compatible